When date.timezone in php.ini is commented out, it gives me:
A PHP Error was encountered
Severity: Warning
Message: main(): It
If you Googled "CodeIgniter PHP 5.3" you would have found this article pretty quickly :)
http://philsturgeon.co.uk/blog/2009/12/CodeIgniter-on-PHP-5.3
To fix this, you only need to edit the main index.php for your CodeIgniter application:
if( ! ini_get('date.timezone') )
{
date_default_timezone_set('GMT');
}
This modification is something you will probably need to make for any CodeIgniter application running on PHP 5.3 and can easily be modified to your local timezone. There is a full list of supported timezones in the PHP manual here.